Dot-Dash.

1943. Sasha is 8 years old, he has become mute after losing his parents. Now attempts to contact the outside world occur through the "dots" and "dashes" of Morse code. When Mikhail Viktorovich, an elderly tuner, appears in their communal apartment, the boy is convinced that he is a spy. Now his task is to save his loved ones by telling them about it.